<!DOCTYPE html>
<script>
if (window.internals)
  internals.settings.setPreferCompositingToLCDTextEnabled(true);
</script>
The overlay scrollbars should be hidden initially.
<div style="width: 200px; height: 200px; border: 1px solid black; overflow: auto">
  <div style="width: 400px; height: 400px"></div>
</div>
